Service And Maintenance; Technical Appendix - York MKL/MKM 25 Technical Manual

12 - SERVICE AND MAINTENANCE

The units are designed to operate for long periods of time with a minimum of maintenance. However, the following
operations must be performed regularly.
COMPONENT
Air filter
Unit casing
Drain pan and
evacuation piping
Indoor / Outdoor coils
Compressor

13 - TECHNICAL APPENDIX

Unit Capacity
Total cooling capacity can be determined by using
correction factors C1, C2 and C3.
Given cooling capacity = Cooling capacity at standard
rating conditions x C1 x C2 x C3.
C1 = Capacity correction factor for temperature
C2 = Capacity correction for piping length
C3 = Capacity correction for indoor unit fan speed
Capacity correction factor for temperature
35
30
Operating temperature range
25
20
15
10
20 25
Air intake dry bulb temperature, outdoor unit (CDB)
R.C. = Standard rating condition : Indoor 27°C DB / 19.5°C WB
03_MKL-MKM.p65
MAINTENANCE OPERATIONS
1 - Clean with a vacuum cleaner or tap gently then wash
in warm water (40°C) with a mild detergent.
2 - Rinse and dry before replacing on unit.
3 - Never use petrol, alcohol or any oter chemical
product.
1 - Remove dust from the front panel with a soft duster
or wipe a dump cloth with a mild soap solution.
2 - Never use petrol, alcohol or any other chemical
product.
1 - Clean and check for obstructions.
1 - Check condition and remove dust from between
coil fins.
1 - No maintenance required
Capacity correction factor C1
120%
R.C.
85%
85%
30 35 40
Outdoor 35°C DB / 24°C WB
17
Every month or more often if
necessary
Every month or more often if
necessary
Each season before start up
Each season before start up.
Capacity correction factor for piping length (C2)
Piping length (m)
Correction factor C2
Capacity correction factor for indoor fan speed (C3)
Fan speed
Correction factor C3
Operating temperature limits
110%
Maximum
100%
90%
+ 46°C
Colling mode
85%
+ 28°C
Heating mode
(heat pump mode)
45
13/6/02, 11:08 am
YORK CASSETTE (EN) 035T76015-000
RECOMMENDED
FREQUENCY
Indoor unit
10
5
0.98
1.00
Indoor unit
High Medium Low
1 0.90 0.75
Minimum
+ 19°C
(-5 with low ambient kit)
- 8°C
17
CASSETTE